High nitrogen flux plasma-assisted molecular beam epitaxy growth of InxGa1-xN films

TitleHigh nitrogen flux plasma-assisted molecular beam epitaxy growth of InxGa1-xN films
Publication TypeJournal Article
Year of Publication2020
AuthorsJorgensen, K. F., B. Bonef, and J. S. Speck
JournalJournal of Crystal Growth
Volume546
Pagination125738
ISSN0022-0248
KeywordsA1. Atom Probe Tomography, A1. Atomic Force Microscopy, A1. High Resolution X-Ray Diffraction, A3. Molecular Beam Epitaxy, B1. Nitrides
Abstract

Growth of efficient III-N based light emitting devices by plasma assisted molecular beam epitaxy has been elusive, even though the technique has attractive advantages in comparison to metal organic chemical vapor deposition. Modern high-flux radio frequency plasma systems could remedy this issue by enabling growth of InxGa1-xN at higher temperatures than previously possible, likely improving the material quality. In this work, active nitrogen fluxes of up to 3.5 μm/h GaN-equivalent growth rate were employed to grow InxGa1-xN alloys. InxGa1-xN growth rates of 1.3 μm/h were demonstrated at growth temperatures of 550 °C and 600 °C with maximum film compositions of In0.25Ga0.75N and In0.21Ga0.79N, respectively. A composition of In0.05Ga0.95N was observed in a film grown at 700 °C with smooth step-terrace morphology.

URLhttp://www.sciencedirect.com/science/article/pii/S002202482030261X
DOI10.1016/j.jcrysgro.2020.125738